When Paige holds up her shrunken sweater, the embroidered side is facing outward. In the next shot, it's facing inward.
None of the actors portraying Leprechauns were actually Irish, and as such all of their accents are woefully bad. Many of the things they say are mispronounced, notably "bollocks" being said as "bull-ocks", and "Slainte" being said as "Slan-tuh" instead of "Slahn-che."